function [H r c] = initFilterSize(fftImage)
isColor = size(size(fftImage),2) > 2;

% isColor == 1 -> fftImage = mxnx3
if (isColor == 1)
    [r c h] = size(fftImage);
else
    [r c] = size(fftImage);
end

% initialize filter transfer function
H = zeros(r,c);

end